<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>Document</title>
  </head>

  <body>
    <ul>
      <!-- { id:"1", name:"姓名1" } -->
      <li>1</li>
      <!-- { id:"2", name:"姓名2" } -->
      <li>2</li>
      <!-- { id:"3", name:"姓名3" } -->
      <li>3</li>
    </ul>
    <script>
      const wmap = new WeakMap();
      let lis = document.querySelectorAll('li');
      for (const li of lis) {
        wmap.set(li, {
          id: li.innerHTML,
          name: `姓名${li.innerHTML}`,
        });
      }
      lis[0].remove();
      lis = null;

      console.log(wmap);
    </script>
  </body>
</html>
